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Sensory Cortices (Somatosensory cortex (Agnosias (Astereognosia (inability…

- - - - lateral to SI
  - - - Penfield 1937
        
        sens discrimination↑= distribution bias
        
        Medial= legs lateral=arms
        
        Damage-> mild effects-> multiple pathways
        
        Corkin et al (1970)
        
        lesion of SI in epileptics
        
        ↓ability ID objects by touch
        
        ↓ability detect light touch
  - - - inability recog objects by touch
        
        absence of simple sensory deficits
    - - failure recog parts own body
        
        left body (unilateral)
        
        Excessive damage
        
        Right temporal lobe
        
        Posterior Parietal
- - - - Damage to
        
        Prosopagnosia
        
        1947 German neurologist Joachim Bodamer
        
        The man who mistook his wife for a hat
        
        Difficulty recog people
      - (Right fusiform gyrus)
  - - - Area blindness contralateral area visual field
        
        many patients unaware
  - - - Projects↑ to posterior parietal cortex
        
        Spatial stimuli
        
        Damage to
        
        can describe objects, not reach out
        
        Primary VC
    - - Projects across to inferotemporal cortex
        
        Object characteristics e.g. colour
        
        Damage to
        
        can reach out/ pick up can't describe
        
        Secondary VC
- - - - (Lateral Sulcus of superior temporal lobe)
    - - (Posterior to Primary Auditory Cortex
      - Evaluates sounds
      - near Wernicke's)
  - - - connects to limbic system
- - - - ↓ intensity electric stimu cortical surface
        
        activates contralateral muscle movement
        
        ∴somatotopical arrangement-> motor homunculus
    - - Electrical stimu secondary motor area→complex bilateral body movement
      - Frontal eye field
        
        ctrl vol eye movements
        
        Anterior to pc
      - Premotor cortex
        
        Planning movement
        
        ↑ly Processed sensory info
        
        anterior to PMAC
      - Posterior parietal association cortex (ppac)
        
        DLPFC receives projections from ppac→secondary mc, pmc, frontal eye lid
        
        spatial info prior to movement
        
        integrate info body orientation+external object positions